Will the iPad spike MiFi demand?

Or, said another way, do I really need another data plan in my life?

I haven’t heard too much chatter about running an iPad through a MiFi card but it seems to be an excellent path to connectivity. I have been using one of the Sprint MiFi cards for about a year and look forward to connecting an iPad next month.

I’m wondering if there will be a spike in MiFi demand at Sprint and Verizon (the two carriers currently offering the wireless router). This seems like a solid strategy for people who would like to have only one data plan. A standard cell phone (with no data enabled) plus a MiFi card through which all Wi-Fi enabled devices can connect to the internet could make the single data plan a reality.

Also, according to Apple, the initial iPads will only be available in Wi-Fi versions.